Summary of Significant Accounting Policies (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) bbl MMBTU $ / MMBTU $ / Boe	Mar. 31, 2019 USD ($)	May 04, 2020 bbl MMBTU $ / MMBTU $ / Boe	Dec. 31, 2019 USD ($)
Property and Equipment
Proved oil and gas properties | $	$ 1,251,110			$ 1,201,296
Unproved oil and gas properties | $	42,249			41,201
Furniture, fixtures, and other equipment | $	5,094			5,220
Less - Accumulated depreciation, depletion, and amortization | $	(499,759)			(380,728)
Net Furniture, Fixtures and other equipment | $	798,694			866,989
Disaggregation of Revenue [Line Items]
Oil and gas sales | $	53,377	$ 72,064
Accounts Payable and Accrued Liabilities
Trade accounts payable | $	27,409			26,121
Accrued operating expenses | $	3,388			3,873
Accrued compensation costs | $	1,865			4,601
Asset retirement obligation - current portion | $	387			392
Accrued non-income based taxes | $	2,042			1,413
Accrued corporate and legal fees | $	247			109
Other payables | $	821			2,834
Total Accounts payable and accrued liabilities | $	36,159			$ 39,343
Oil sales [Member]
Disaggregation of Revenue [Line Items]
Oil and gas sales | $	18,050	14,607
Natural gas sales [Member]
Disaggregation of Revenue [Line Items]
Oil and gas sales | $	31,472	51,304
NGL sales [Member]
Disaggregation of Revenue [Line Items]
Oil and gas sales | $	$ 3,855	$ 6,154
Swap [Member] | Second Quarter 2020 [Member] | Natural Gas Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU	7,430,000
Derivative, Swap Type, Fixed Price	2.62
Swap [Member] | Second Quarter 2020 [Member] | Oil Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | bbl	359,126
Derivative, Swap Type, Fixed Price | $ / Boe	53.60
Swap [Member] | Second Quarter 2020 [Member] | Oil Derivative Swaps [Member] | Subsequent Event [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | bbl			(93,450)
Derivative, Swap Type, Fixed Price | $ / Boe			17.69
Swap [Member] | Fourth Quarter 2020 [Member] | Natural Gas Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU	7,042,000
Derivative, Swap Type, Fixed Price	2.63
Swap [Member] | Fourth Quarter 2020 [Member] | Natural Gas Derivative Swaps [Member] | Subsequent Event [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU			775,000
Derivative, Swap Type, Fixed Price			2.69
Swap [Member] | Fourth Quarter 2020 [Member] | Oil Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | bbl	244,556
Derivative, Swap Type, Fixed Price | $ / Boe	52.76
Swap [Member] | First Quarter 2021 [Member] | Natural Gas Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU	148,078
Derivative, Swap Type, Fixed Price	2.70
Swap [Member] | First Quarter 2021 [Member] | Natural Gas Derivative Swaps [Member] | Subsequent Event [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU			2,250,000
Derivative, Swap Type, Fixed Price			2.74
Swap [Member] | First Quarter 2021 [Member] | Oil Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | bbl	215,538
Derivative, Swap Type, Fixed Price | $ / Boe	51.93
Swap [Member] | Second Quarter 2021 [Member] | Natural Gas Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU	442,255
Derivative, Swap Type, Fixed Price	2.30
Swap [Member] | Second Quarter 2021 [Member] | Natural Gas Derivative Swaps [Member] | Subsequent Event [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU			195,000
Derivative, Swap Type, Fixed Price			2.59
Swap [Member] | Second Quarter 2021 [Member] | Oil Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | bbl	195,646
Derivative, Swap Type, Fixed Price | $ / Boe	51.93
Swap [Member] | Third Quarter 2021 [Member] | Natural Gas Derivative Swaps [Member] | Subsequent Event [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU			165,000
Derivative, Swap Type, Fixed Price			2.65
Swap [Member] | Third Quarter 2021 [Member] | Oil Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | bbl	179,759
Derivative, Swap Type, Fixed Price | $ / Boe	51.19
Swap [Member] | Fourth Quarter 2021 [Member] | Natural Gas Derivative Swaps [Member] | Subsequent Event [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU			150,000
Derivative, Swap Type, Fixed Price			2.71
Swap [Member] | Fourth Quarter 2021 [Member] | Oil Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | bbl	163,812
Derivative, Swap Type, Fixed Price | $ / Boe	52.39
Swap [Member] | First Quarter 2022 [Member] [Member] | Oil Derivative Swaps [Member] | Subsequent Event [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | bbl			45,000
Derivative, Swap Type, Fixed Price | $ / Boe			38.55
Collar Contracts [Member] | Fourth Quarter 2020 [Member] | Natural Gas Derivative Swaps [Member] | Subsequent Event [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU			310,000
Derivative, Average Floor Price			2.60
Derivative, Average Cap Price			3.06
Collar Contracts [Member] | First Quarter 2021 [Member] | Natural Gas Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU	5,227,800
Derivative, Average Floor Price	2.50
Derivative, Average Cap Price	3.40
Collar Contracts [Member] | First Quarter 2021 [Member] | Natural Gas Derivative Swaps [Member] | Subsequent Event [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU			1,800,000
Derivative, Average Floor Price			2.60
Derivative, Average Cap Price			3.14
Collar Contracts [Member] | Second Quarter 2021 [Member] | Natural Gas Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU	4,546,000
Derivative, Average Floor Price	2.18
Derivative, Average Cap Price	2.69
Collar Contracts [Member] | Third Quarter 2021 [Member] | Natural Gas Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU	4,665,175
Derivative, Average Floor Price	2.02
Derivative, Average Cap Price	2.65
Collar Contracts [Member] | Fourth Quarter 2021 [Member] | Natural Gas Derivative Swaps [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU	4,391,000
Derivative, Average Floor Price	2.25
Derivative, Average Cap Price	2.71
Collar Contracts [Member] | First Quarter 2022 [Member] [Member] | Natural Gas Derivative Swaps [Member] | Subsequent Event [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | MMBTU			3,150,000
Derivative, Average Floor Price			2.50
Derivative, Average Cap Price			3.26
Basis Swap [Member] | Second Quarter 2020 [Member] | Oil Basis Derivative [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | bbl	227,500
Derivative, Swap Type, Fixed Price	0.49
Basis Swap [Member] | Second Quarter 2020 [Member] | Oil Basis Derivative [Member] | Subsequent Event [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | bbl			66,000
Derivative, Swap Type, Fixed Price			3.35
Basis Swap [Member] | Fourth Quarter 2020 [Member] | Oil Basis Derivative [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Production Hedged Volumes | bbl	230,000
Derivative, Swap Type, Fixed Price	0.49